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標題: LCD1602無法正常顯示 [打印本頁]

作者: 菜鳥一號1 時間: 2019-3-9 13:52
標題: LCD1602無法正常顯示
做的是汽車智能雨刷器，上電后液晶屏第一行顯示黑色方塊，第二行不顯示，用下面的程序仿真可以實現，實物圖就不行了，其他功能都正常。求各位大神幫忙看一下哪里出問題了。
#include <REGX52.H>
#include <ADC0832.H>
#include <LCD1602.H>
#include <eeprom52.H>

uchar i=0;
uint dat;
uint dat1=0;
uint dat2=0;
uint dat_value=0;
uint DJ_dat=0,ms=0,ms_1=0;
uchar loop=0;

sbit key_1=P3^1;
sbit key_2=P3^2;
sbit key_3=P3^3;
sbit key_4=P3^4;

sbit led0=P2^0;
sbit led1=P2^1;

bit key_1_flag=0;
bit key_2_flag=0;
bit key_3_flag=0;
bit key_4_flag=0;

bit A_M=1;
uchar speed_flag=0;

uint Value=1000;
uint water_h=0;
uint water_l=0;
uchar state=0;
bit  star_off=1,zheng_fan=1,s0=0,ir_on=0;

  uchar zz[]=    //正轉數據
{
0x01,0x03,0x02,0x06,0x04,0x0c,0x08,0x09
};

  uchar fz[]=    //反轉數據
{
0x09,0x08,0x0c,0x04,0x06,0x02,0x03,0x01
};

void display()
  {
void LCD1602_Write_Cmd(uchar cmd)
{
Read_Busy();    //判斷忙，忙則等待
LCD1602_RS = 0;
LCD1602_RW = 0; //拉低RS、RW操作時序情況1602課件下中文使用說明基本操作時序章節
LCD1602_DB = cmd;//寫入命令
LCD1602_EN = 1;    //拉高使能端數據被傳輸到LCD1602內
LCD1602_EN = 0;    //拉低使能以便于下一次產生上升沿
}
/*=================================================
*函數名稱：LCD1602_Write_Dat
*函數功能：寫LCD1602數據
*調用：Read_Busy();
*輸入：dat：需要寫入的數據
=================================================*/
void LCD1602_Write_Dat(uchar dat)
{
Read_Busy();
LCD1602_RS = 1;
LCD1602_RW = 0;
LCD1602_DB = dat;
LCD1602_EN = 1;
LCD1602_EN = 0;
}
/*=================================================
*函數名稱：LCD1602_Dis_OneChar
*函數功能：在指定位置顯示一個字符
*調用：LCD1602_Write_Cmd(); LCD1602_Write_Dat();
*輸入：x：要顯示的橫坐標取值0-40，y：要顯示的行坐標取值0-1（0為第一行,1為第二行）
dat：需要顯示的數據以ASCLL形式顯示
=================================================*/
void LCD1602_Dis_OneChar(uchar x, uchar y,uchar dat)
{
if(y) x |= 0x40;
x |= 0x80;
LCD1602_Write_Cmd(x);
LCD1602_Write_Dat(dat);
}

   LCD1602_write(0,0x80);
         LCD1602_writebyte("Water:");
   if(dat>99) LCD1602_write(1,0x30+dat/100%10);
else       LCD1602_write(1,' ');
   if(dat>9)  LCD1602_write(1,0x30+dat/10%10);
else       LCD1602_write(1,' ');
   LCD1602_write(1,0x30+dat%10);
         LCD1602_writebyte("% ");
   if(A_M==0) LCD1602_writebyte("A ");
   else    LCD1602_writebyte("M ");

   if(star_off==0) LCD1602_writebyte("K ");
   else    LCD1602_writebyte("G ");
   LCD1602_write(1,0x30+speed_flag%10);
   LCD1602_writebyte(" ");

   dat_value=dat;
   LCD1602_write(0,0xC0);
         LCD1602_writebyte("H:");
   if(state==1&&s0) LCD1602_writebyte(" ");
   else
      {
   if(water_h>99) LCD1602_write(1,0x30+water_h/100%10);
else       LCD1602_write(1,' ');
        if(water_h>9)  LCD1602_write(1,0x30+water_h/10%10);
else       LCD1602_write(1,' ');
   LCD1602_write(1,0x30+water_h%10);
}
   LCD1602_writebyte("% ");
         LCD1602_writebyte("L:");
   if(state==2&&s0) LCD1602_writebyte(" ");
   else
      {
   if(water_l>99) LCD1602_write(1,0x30+water_l/100%10);
else       LCD1602_write(1,' ');
        if(water_l>9)  LCD1602_write(1,0x30+water_l/10%10);
else       LCD1602_write(1,' ');
   LCD1602_write(1,0x30+water_l%10);
}
   LCD1602_writebyte("%");
  }
void key_dispose()
{
if(key_1==0)
   {
      LCD1602_delay(20);
   if(key_1_flag)
      {
         key_1_flag=0;
   state=(state+1)%3;
   }
   }
   else key_1_flag=1;

if(key_2==0)
   {
      LCD1602_delay(20);
   if(key_2_flag)
      {
      key_2_flag=0;
if(state==1)
   {
   if(water_h<100)    water_h++;
      SectorErase(0x2000);
      byte_write(0x2000,water_h);
   }
if(state==2)
   {
   if(water_l<water_h-1) water_l++;
      SectorErase(0x2200);
      byte_write(0x2200,water_l);
   }
if(state==0)
   {
   A_M=~A_M; star_off=1;
   }
   }
   }
   else    key_2_flag=1;

if(key_3==0)
   {
   LCD1602_delay(20);
   if(key_3_flag)
      {
      key_3_flag=0;
if(state==1)
   {
   if(water_h>water_l+1) water_h--;
      SectorErase(0x2000);
      byte_write(0x2000,water_h);
   }
if(state==2)
   {
   if(water_l>0)       water_l--;
      SectorErase(0x2200);
      byte_write(0x2200,water_l);
   }
if(state==0)
   {
   if(A_M==1)
      {
   star_off=~star_off;
   if(star_off==0) speed_flag=1;
   else    speed_flag=0;
}
   }
   }
   }
   else key_3_flag=1;
if(key_4==0)
   {
   LCD1602_delay(20);
   if(key_4_flag)
      {
   key_4_flag=0;
   if(A_M)
   {
      speed_flag=(speed_flag+1)%3;

   }
   }
   }
   else key_4_flag=1;

   if(A_M==0)
   {
      led0=0;
led1=1;
   }
   else
   {
      led1=0;
led0=1;

   }

   if(speed_flag==2)
   {
      Value=260;
   }
   else  if(speed_flag==1||speed_flag==0)
   {
      Value=500;
   }

}

void police_dispose()
{ ir_on=0;
if(dat_value>water_h)
      {
   star_off=0; speed_flag=2;
}
else  if(dat_value>=water_l&&dat_value<=water_h)
   {
   star_off=0; speed_flag=1;
   }
else if(dat_value<water_l)
      {
   star_off=1;    speed_flag=0;
   }

}

void main()
{

water_h=byte_read(0x2000);
water_l=byte_read(0x2200);
if(water_h<water_l||water_h>100||water_l<0)
{
   water_h=60;
   water_l=10;
}

TMOD=0x11;
TH1=0x3c;
TL1=0xb0;
TH0=0x3c;
TL0=0xb0;
ET1=1;

ET0=1;
EA=1;

TR0=1;
TR1=1;
LCD1602_cls();
while(1)
{
   if(A_M==0)
      { police_dispose();
   if(star_off==0)
   {

           if(DJ_dat==0) loop=0;
         while(DJ_dat<180)
{
P1=P1&0xf0|zz[loop];
loop=(loop+1)%8;

if(loop==0) DJ_dat++;
LCD1602_delay(Value);
}
   if(DJ_dat==120)loop=0;
   while(DJ_dat!=0)
{
P1=P1&0xf0|fz[loop];
loop=(loop+1)%8;

if(loop==0) DJ_dat--;
LCD1602_delay(Value);
}

   }
}
else
{

if(speed_flag!=0)
   {
   if(star_off==0)
   {

           if(DJ_dat==0) loop=0;
         while(DJ_dat<180)
{
P1=P1&0xf0|zz[loop];
loop=(loop+1)%8;

if(loop==0) DJ_dat++;
LCD1602_delay(Value);
}
   if(DJ_dat==120)loop=0;
   while(DJ_dat!=0)
{
P1=P1&0xf0|fz[loop];
loop=(loop+1)%8;

if(loop==0) DJ_dat--;
LCD1602_delay(Value);
}
   }
   }
   else
   {
      loop=0;  DJ_dat=0;
   }

}
   }
   //1毫秒定時
}

void time_1(void) interrupt 1
{
TH0=0x3c;
TL0=0xb0;
ms_1++;
if(i<10)
   {
i++;
dat1+=A_D(0);             //滿量程0-255 實際完全浸入水中是255-36= 219    0-219
   }
else
   {
      i=0;
   dat1=dat1/10;
   if(dat1<=36) dat1=36;
   dat1=dat1-36;
   dat=100-(dat1/2.19);         dat1=0;
   }
if(ms_1>=10)
{
   ms_1=0;
   s0=~s0;

}
}

void time_0(void) interrupt 3
{

TH1=0x3c;
TL1=0xb0;
   display();
   key_dispose();

}

(U4S0G6[%5%VG8P79CMBPWW.png (43.5 KB, 下載次數: 19)

(SQ0X{K80X910XX6FO@A6PT.png (44.73 KB, 下載次數: 26)

作者: wc86110 時間: 2019-3-9 23:02
圖上 R1 可以去掉，RV1 RP1 阻值要恰當并調好對比度，再檢查電路是否還有其它問題

作者: zhb2004xp 時間: 2019-3-10 00:29
LCD1602仿真程序在實際運行時，需要在LCD1602的子函數中加入適當延時，以等待器件處理。例如
      LCD1602_RS = 0;
      LCD1602_RW = 0;       //拉低RS、RW操作時序情況1602課件下中文使用說明基本操作時序章節
      延時；
      LCD1602_DB = cmd;//寫入命令
      LCD1602_EN = 1;       //拉高使能端數據被傳輸到LCD1602內
   延時；
      LCD1602_EN = 0;       //拉低使能以便于下一次產生上升沿

作者: zhb2004xp 時間: 2019-3-10 00:30
最好在網上找個例程（很多啊），參考一下

作者: 1092648746 時間: 2019-3-10 12:47
仿真可以的話就，檢查下屏幕對比度的設置？1602屏幕種類很多，每個屏幕的對比度調節都不一樣的，對比度過大就會出現一大堆方塊了。

歡迎光臨 (http://www.raoushi.com/bbs/)